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Code Issues Releases Wiki Activity

rxrpc: trace: Don't use __builtin_return_address for rxrpc_local tracing

Browse source 
In rxrpc tracing, use enums to generate lists of points of interest rather
than __builtin_return_address() for the rxrpc_local tracepoint

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
This commit is contained in:
David Howells 2022-10-21 13:00:34 +01:00
parent f14febd8df
commit 0fde882fc9
13 changed files with 129 additions and 76 deletions
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49
include/trace/events/rxrpc.h
View file

@ -32,12 +32,35 @@
E_(rxrpc_skb_unshared_nomem, "US0")
#define rxrpc_local_traces \
EM(rxrpc_local_got, "GOT") \
EM(rxrpc_local_new, "NEW") \
EM(rxrpc_local_processing, "PRO") \
EM(rxrpc_local_put, "PUT") \
EM(rxrpc_local_queued, "QUE") \
E_(rxrpc_local_tx_ack, "TAK")
EM(rxrpc_local_free, "FREE ") \
EM(rxrpc_local_get_client_conn, "GET conn-cln") \
EM(rxrpc_local_get_for_use, "GET for-use ") \
EM(rxrpc_local_get_peer, "GET peer ") \
EM(rxrpc_local_get_prealloc_conn, "GET conn-pre") \
EM(rxrpc_local_get_queue, "GET queue ") \
EM(rxrpc_local_new, "NEW ") \
EM(rxrpc_local_processing, "PROCESSING ") \
EM(rxrpc_local_put_already_queued, "PUT alreadyq") \
EM(rxrpc_local_put_bind, "PUT bind ") \
EM(rxrpc_local_put_for_use, "PUT for-use ") \
EM(rxrpc_local_put_kill_conn, "PUT conn-kil") \
EM(rxrpc_local_put_peer, "PUT peer ") \
EM(rxrpc_local_put_prealloc_conn, "PUT conn-pre") \
EM(rxrpc_local_put_release_sock, "PUT rel-sock") \
EM(rxrpc_local_put_queue, "PUT queue ") \
EM(rxrpc_local_queued, "QUEUED ") \
EM(rxrpc_local_see_tx_ack, "SEE tx-ack ") \
EM(rxrpc_local_stop, "STOP ") \
EM(rxrpc_local_stopped, "STOPPED ") \
EM(rxrpc_local_unuse_bind, "UNU bind ") \
EM(rxrpc_local_unuse_conn_work, "UNU conn-wrk") \
EM(rxrpc_local_unuse_peer_keepalive, "UNU peer-kpa") \
EM(rxrpc_local_unuse_release_sock, "UNU rel-sock") \
EM(rxrpc_local_unuse_work, "UNU work ") \
EM(rxrpc_local_use_conn_work, "USE conn-wrk") \
EM(rxrpc_local_use_lookup, "USE lookup ") \
EM(rxrpc_local_use_peer_keepalive, "USE peer-kpa") \
E_(rxrpc_local_use_work, "USE work ")
#define rxrpc_peer_traces \
EM(rxrpc_peer_got, "GOT") \
@ -345,29 +368,29 @@ rxrpc_txqueue_traces;
TRACE_EVENT(rxrpc_local,
TP_PROTO(unsigned int local_debug_id, enum rxrpc_local_trace op,
int usage, const void *where),
int ref, int usage),
TP_ARGS(local_debug_id, op, usage, where),
TP_ARGS(local_debug_id, op, ref, usage),
TP_STRUCT__entry(
__field(unsigned int, local )
__field(int, op )
__field(int, ref )
__field(int, usage )
__field(const void *, where )
),
TP_fast_assign(
__entry->local = local_debug_id;
__entry->op = op;
__entry->ref = ref;
__entry->usage = usage;
__entry->where = where;
),
TP_printk("L=%08x %s u=%d sp=%pSR",
TP_printk("L=%08x %s r=%d u=%d",
__entry->local,
__print_symbolic(__entry->op, rxrpc_local_traces),
__entry->usage,
__entry->where)
__entry->ref,
__entry->usage)
);
TRACE_EVENT(rxrpc_peer,

8
net/rxrpc/af_rxrpc.c
View file

@ -194,8 +194,8 @@ static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
service_in_use:
write_unlock(&local->services_lock);
rxrpc_unuse_local(local);
rxrpc_put_local(local);
rxrpc_unuse_local(local, rxrpc_local_unuse_bind);
rxrpc_put_local(local, rxrpc_local_put_bind);
ret = -EADDRINUSE;
error_unlock:
release_sock(&rx->sk);
@ -888,8 +888,8 @@ static int rxrpc_release_sock(struct sock *sk)
flush_workqueue(rxrpc_workqueue);
rxrpc_purge_queue(&sk->sk_receive_queue);
rxrpc_unuse_local(rx->local);
rxrpc_put_local(rx->local);
rxrpc_unuse_local(rx->local, rxrpc_local_unuse_release_sock);
rxrpc_put_local(rx->local, rxrpc_local_put_release_sock);
rx->local = NULL;
key_put(rx->key);
rx->key = NULL;

41
net/rxrpc/ar-internal.h
View file

@ -979,22 +979,45 @@ extern void rxrpc_process_local_events(struct rxrpc_local *);
* local_object.c
*/
struct rxrpc_local *rxrpc_lookup_local(struct net *, const struct sockaddr_rxrpc *);
struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *);
struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *);
void rxrpc_put_local(struct rxrpc_local *);
struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *);
void rxrpc_unuse_local(struct rxrpc_local *);
struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *, enum rxrpc_local_trace);
struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *, enum rxrpc_local_trace);
void rxrpc_put_local(struct rxrpc_local *, enum rxrpc_local_trace);
struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *, enum rxrpc_local_trace);
void rxrpc_unuse_local(struct rxrpc_local *, enum rxrpc_local_trace);
void rxrpc_queue_local(struct rxrpc_local *);
void rxrpc_destroy_all_locals(struct rxrpc_net *);
static inline bool __rxrpc_unuse_local(struct rxrpc_local *local)
static inline bool __rxrpc_unuse_local(struct rxrpc_local *local,
enum rxrpc_local_trace why)
{
return atomic_dec_return(&local->active_users) == 0;
unsigned int debug_id = local->debug_id;
int r, u;
r = refcount_read(&local->ref);
u = atomic_dec_return(&local->active_users);
trace_rxrpc_local(debug_id, why, r, u);
return u == 0;
}
static inline bool __rxrpc_use_local(struct rxrpc_local *local)
static inline bool __rxrpc_use_local(struct rxrpc_local *local,
enum rxrpc_local_trace why)
{
return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0;
int r, u;
r = refcount_read(&local->ref);
u = atomic_fetch_add_unless(&local->active_users, 1, 0);
trace_rxrpc_local(local->debug_id, why, r, u);
return u != 0;
}
static inline void rxrpc_see_local(struct rxrpc_local *local,
enum rxrpc_local_trace why)
{
int r, u;
r = refcount_read(&local->ref);
u = atomic_read(&local->active_users);
trace_rxrpc_local(local->debug_id, why, r, u);
}
/*

4
net/rxrpc/call_accept.c
View file

@ -197,7 +197,7 @@ void rxrpc_discard_prealloc(struct rxrpc_sock *rx)
tail = b->peer_backlog_tail;
while (CIRC_CNT(head, tail, size) > 0) {
struct rxrpc_peer *peer = b->peer_backlog[tail];
rxrpc_put_local(peer->local);
rxrpc_put_local(peer->local, rxrpc_local_put_prealloc_conn);
kfree(peer);
tail = (tail + 1) & (size - 1);
}
@ -305,7 +305,7 @@ static struct rxrpc_call *rxrpc_alloc_incoming_call(struct rxrpc_sock *rx,
b->conn_backlog[conn_tail] = NULL;
smp_store_release(&b->conn_backlog_tail,
(conn_tail + 1) & (RXRPC_BACKLOG_MAX - 1));
conn->local = rxrpc_get_local(local);
conn->local = rxrpc_get_local(local, rxrpc_local_get_prealloc_conn);
conn->peer = peer;
rxrpc_see_connection(conn);
rxrpc_new_incoming_connection(rx, conn, sec, skb);

2
net/rxrpc/call_event.c
View file

@ -114,7 +114,7 @@ void rxrpc_send_ACK(struct rxrpc_call *call, u8 ack_reason,
if (in_task()) {
rxrpc_transmit_ack_packets(call->peer->local);
} else {
rxrpc_get_local(local);
rxrpc_get_local(local, rxrpc_local_get_queue);
rxrpc_queue_local(local);
}
}

2
net/rxrpc/conn_client.c
View file

@ -208,7 +208,7 @@ rxrpc_alloc_client_connection(struct rxrpc_bundle *bundle, gfp_t gfp)
rxrpc_get_bundle(bundle);
rxrpc_get_peer(conn->peer);
rxrpc_get_local(conn->local);
rxrpc_get_local(conn->local, rxrpc_local_get_client_conn);
key_get(conn->key);
trace_rxrpc_conn(conn->debug_id, rxrpc_conn_new_client,

4
net/rxrpc/conn_event.c
View file

@ -474,9 +474,9 @@ void rxrpc_process_connection(struct work_struct *work)
rxrpc_see_connection(conn);
if (__rxrpc_use_local(conn->local)) {
if (__rxrpc_use_local(conn->local, rxrpc_local_use_conn_work)) {
rxrpc_do_process_connection(conn);
rxrpc_unuse_local(conn->local);
rxrpc_unuse_local(conn->local, rxrpc_local_unuse_conn_work);
}
rxrpc_put_connection(conn);

2
net/rxrpc/conn_object.c
View file

@ -366,7 +366,7 @@ static void rxrpc_destroy_connection(struct rcu_head *rcu)
if (atomic_dec_and_test(&conn->local->rxnet->nr_conns))
wake_up_var(&conn->local->rxnet->nr_conns);
rxrpc_put_local(conn->local);
rxrpc_put_local(conn->local, rxrpc_local_put_kill_conn);
kfree(conn);
_leave("");

4
net/rxrpc/input.c
View file

@ -1133,7 +1133,7 @@ static void rxrpc_post_packet_to_local(struct rxrpc_local *local,
{
_enter("%p,%p", local, skb);
if (rxrpc_get_local_maybe(local)) {
if (rxrpc_get_local_maybe(local, rxrpc_local_get_queue)) {
skb_queue_tail(&local->event_queue, skb);
rxrpc_queue_local(local);
} else {
@ -1146,7 +1146,7 @@ static void rxrpc_post_packet_to_local(struct rxrpc_local *local,
*/
static void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb)
{
if (rxrpc_get_local_maybe(local)) {
if (rxrpc_get_local_maybe(local, rxrpc_local_get_queue)) {
skb_queue_tail(&local->reject_queue, skb);
rxrpc_queue_local(local);
} else {

78
net/rxrpc/local_object.c
View file

@ -110,7 +110,7 @@ static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet,
local->debug_id = atomic_inc_return(&rxrpc_debug_id);
memcpy(&local->srx, srx, sizeof(*srx));
local->srx.srx_service = 0;
trace_rxrpc_local(local->debug_id, rxrpc_local_new, 1, NULL);
trace_rxrpc_local(local->debug_id, rxrpc_local_new, 1, 1);
}
_leave(" = %p", local);
@ -228,7 +228,7 @@ struct rxrpc_local *rxrpc_lookup_local(struct net *net,
* we're attempting to use a local address that the dying
* object is still using.
*/
if (!rxrpc_use_local(local))
if (!rxrpc_use_local(local, rxrpc_local_use_lookup))
break;
goto found;
@ -272,32 +272,32 @@ struct rxrpc_local *rxrpc_lookup_local(struct net *net,
/*
* Get a ref on a local endpoint.
*/
struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *local)
struct rxrpc_local *rxrpc_get_local(struct rxrpc_local *local,
enum rxrpc_local_trace why)
{
const void *here = __builtin_return_address(0);
int r;
int r, u;
u = atomic_read(&local->active_users);
__refcount_inc(&local->ref, &r);
trace_rxrpc_local(local->debug_id, rxrpc_local_got, r + 1, here);
trace_rxrpc_local(local->debug_id, why, r + 1, u);
return local;
}
/*
* Get a ref on a local endpoint unless its usage has already reached 0.
*/
struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local,
enum rxrpc_local_trace why)
{
const void *here = __builtin_return_address(0);
int r;
int r, u;
if (local) {
if (__refcount_inc_not_zero(&local->ref, &r))
trace_rxrpc_local(local->debug_id, rxrpc_local_got,
r + 1, here);
else
local = NULL;
if (local && __refcount_inc_not_zero(&local->ref, &r)) {
u = atomic_read(&local->active_users);
trace_rxrpc_local(local->debug_id, why, r + 1, u);
return local;
}
return local;
return NULL;
}
/*
@ -305,31 +305,31 @@ struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
*/
void rxrpc_queue_local(struct rxrpc_local *local)
{
const void *here = __builtin_return_address(0);
unsigned int debug_id = local->debug_id;
int r = refcount_read(&local->ref);
int u = atomic_read(&local->active_users);
if (rxrpc_queue_work(&local->processor))
trace_rxrpc_local(debug_id, rxrpc_local_queued, r + 1, here);
trace_rxrpc_local(debug_id, rxrpc_local_queued, r, u);
else
rxrpc_put_local(local);
rxrpc_put_local(local, rxrpc_local_put_already_queued);
}
/*
* Drop a ref on a local endpoint.
*/
void rxrpc_put_local(struct rxrpc_local *local)
void rxrpc_put_local(struct rxrpc_local *local, enum rxrpc_local_trace why)
{
const void *here = __builtin_return_address(0);
unsigned int debug_id;
bool dead;
int r;
int r, u;
if (local) {
debug_id = local->debug_id;
u = atomic_read(&local->active_users);
dead = __refcount_dec_and_test(&local->ref, &r);
trace_rxrpc_local(debug_id, rxrpc_local_put, r, here);
trace_rxrpc_local(debug_id, why, r, u);
if (dead)
call_rcu(&local->rcu, rxrpc_local_rcu);
@ -339,14 +339,15 @@ void rxrpc_put_local(struct rxrpc_local *local)
/*
* Start using a local endpoint.
*/
struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *local)
struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *local,
enum rxrpc_local_trace why)
{
local = rxrpc_get_local_maybe(local);
local = rxrpc_get_local_maybe(local, rxrpc_local_get_for_use);
if (!local)
return NULL;
if (!__rxrpc_use_local(local)) {
rxrpc_put_local(local);
if (!__rxrpc_use_local(local, why)) {
rxrpc_put_local(local, rxrpc_local_put_for_use);
return NULL;
}
@ -357,11 +358,18 @@ struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *local)
* Cease using a local endpoint. Once the number of active users reaches 0, we
* start the closure of the transport in the work processor.
*/
void rxrpc_unuse_local(struct rxrpc_local *local)
void rxrpc_unuse_local(struct rxrpc_local *local, enum rxrpc_local_trace why)
{
unsigned int debug_id;
int r, u;
if (local) {
if (__rxrpc_unuse_local(local)) {
rxrpc_get_local(local);
debug_id = local->debug_id;
r = refcount_read(&local->ref);
u = atomic_dec_return(&local->active_users);
trace_rxrpc_local(debug_id, why, r, u);
if (u == 0) {
rxrpc_get_local(local, rxrpc_local_get_queue);
rxrpc_queue_local(local);
}
}
@ -418,12 +426,11 @@ static void rxrpc_local_processor(struct work_struct *work)
if (local->dead)
return;
trace_rxrpc_local(local->debug_id, rxrpc_local_processing,
refcount_read(&local->ref), NULL);
rxrpc_see_local(local, rxrpc_local_processing);
do {
again = false;
if (!__rxrpc_use_local(local)) {
if (!__rxrpc_use_local(local, rxrpc_local_use_work)) {
rxrpc_local_destroyer(local);
break;
}
@ -443,10 +450,10 @@ static void rxrpc_local_processor(struct work_struct *work)
again = true;
}
__rxrpc_unuse_local(local);
__rxrpc_unuse_local(local, rxrpc_local_unuse_work);
} while (again);
rxrpc_put_local(local);
rxrpc_put_local(local, rxrpc_local_put_queue);
}
/*
@ -460,6 +467,7 @@ static void rxrpc_local_rcu(struct rcu_head *rcu)
ASSERT(!work_pending(&local->processor));
rxrpc_see_local(local, rxrpc_local_free);
kfree(local);
_leave("");
}

3
net/rxrpc/output.c
View file

@ -288,8 +288,7 @@ void rxrpc_transmit_ack_packets(struct rxrpc_local *local)
LIST_HEAD(queue);
int ret;
trace_rxrpc_local(local->debug_id, rxrpc_local_tx_ack,
refcount_read(&local->ref), NULL);
rxrpc_see_local(local, rxrpc_local_see_tx_ack);
if (list_empty(&local->ack_tx_queue))
return;

4
net/rxrpc/peer_event.c
View file

@ -266,7 +266,7 @@ static void rxrpc_peer_keepalive_dispatch(struct rxrpc_net *rxnet,
if (!rxrpc_get_peer_maybe(peer))
continue;
if (__rxrpc_use_local(peer->local)) {
if (__rxrpc_use_local(peer->local, rxrpc_local_use_peer_keepalive)) {
spin_unlock_bh(&rxnet->peer_hash_lock);
keepalive_at = peer->last_tx_at + RXRPC_KEEPALIVE_TIME;
@ -289,7 +289,7 @@ static void rxrpc_peer_keepalive_dispatch(struct rxrpc_net *rxnet,
spin_lock_bh(&rxnet->peer_hash_lock);
list_add_tail(&peer->keepalive_link,
&rxnet->peer_keepalive[slot & mask]);
rxrpc_unuse_local(peer->local);
rxrpc_unuse_local(peer->local, rxrpc_local_unuse_peer_keepalive);
}
rxrpc_put_peer_locked(peer);
}

4
net/rxrpc/peer_object.c
View file

@ -215,7 +215,7 @@ struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *local, gfp_t gfp)
peer = kzalloc(sizeof(struct rxrpc_peer), gfp);
if (peer) {
refcount_set(&peer->ref, 1);
peer->local = rxrpc_get_local(local);
peer->local = rxrpc_get_local(local, rxrpc_local_get_peer);
INIT_HLIST_HEAD(&peer->error_targets);
peer->service_conns = RB_ROOT;
seqlock_init(&peer->service_conn_lock);
@ -294,7 +294,7 @@ static struct rxrpc_peer *rxrpc_create_peer(struct rxrpc_sock *rx,
static void rxrpc_free_peer(struct rxrpc_peer *peer)
{
rxrpc_put_local(peer->local);
rxrpc_put_local(peer->local, rxrpc_local_put_peer);
kfree_rcu(peer, rcu);
}